141 
een Nebel Xe. 
BLACK CURRANT. 
Currant Gall Mite. Phytoptus ribis, Nalepa. 
PHYTOPTUS RIBIS, greatly magnified; natural length of female 0-23 mm. (by per- 
mission, after Dr. A. Nalepa). Black Currant twig with Mite Galls. 
For many years the Currant Gall Mite infestation to Black Cur- 
rants has been a trouble to Black Currant growers, but its steadily 
increasing prevalence and the failure of the remedial measures which 
have been hitherto tried to do more than lessen the evil are making 
the matter one for very serious consideration. 
The mischief is caused by an exceedingly minute Mite, too small 
to be seen by the naked eye,—scientifically the Phytoptus ribis,—which 
lives and propagates in the buds, and causes an unnaturally large 
